How does the random motion of free electrons in a conductor get affected when a potential difference is applied across its ends ?
The random motion of free electrons gets directed towards the point at a higher potential.
Alternatively, The random motion becomes a (partially) directed motion.
OR
It is observed that when a potential difference is applied, drift velocity gets superimposed on thermal velocity as a result of which, the free electrons get drifted towards positive end of conductor and constitute electric current.
Alternatively, The random motion becomes a (partially) directed motion.
OR
It is observed that when a potential difference is applied, drift velocity gets superimposed on thermal velocity as a result of which, the free electrons get drifted towards positive end of conductor and constitute electric current.
Write the expression for the drift velocity of charge carriers in a conductor of length l across which a potential difference V is applied.
How does one explain increase in resistivity of a metal with increase in temperature ?
Plot a graph showing the variation of current I versus resistance R, connected to a cell of emf E and internal resistance r.
In a series LR circuit = R and power factor of the circuit is P₁. When capacitor with capacitance C such that = is put in series, the power factor becomes P₂. Calculate P₁ / P₂.
Define the term mobility of charge carriers in a conductor. Write its S.I. unit.
What is the amount of work done in moving a point charge around a circular arc of radius r at the center where another point charge is located ?
A capacitor of 4 μF is connected as shown in the circuit Figure. The internal resistance of the battery is 0.5 Ω. The amount of charge on the capacitor plates will be :
When electrons drift in a metal from lower to higher potential, does it mean that all the free electrons of the metal are moving in the same direction ?
A point charge Q is placed at point ‘O’ as shown in figure. Is the potential at point A, i.e., , greater, smaller or equal to potential, at point B, when Q is (i) positive, and (ii) negative charge?